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One-dimensional CoTe2 nanorods combined with an optimal carbon layer for fast and robust potassium storage.
- Source :
-
New Journal of Chemistry . 9/7/2024, Vol. 48 Issue 33, p14616-14623. 8p. - Publication Year :
- 2024
-
Abstract
- CoTe2 as a high-performance anode material for potassium ion batteries still faces a lot of challenges that hinder its electrochemical performance, including poor intrinsic electronic conductivity, slow reaction kinetics, and significant volume changes during charging and discharging processes. To address these issues, one-dimensional CoTe2 nanorods were synthesized using a one-step hydrothermal method and then coated with a carbon layer to form CoTe2@C nanocomposites. The resulting composite exhibited a significant interaction between CoTe2 and the carbon layer, resulting in the formation of a stable heterostructure. This interaction not only improved the electrical conductivity of the composites but also facilitated the migration of electrons and K+ ions. When used as the anode for potassium ion batteries, the CoTe2@C anode demonstrated enhanced electrochemical performance. At a current density of 0.5 A g−1, the CoTe2@C anode exhibited a reversible capacity of 100.3 mA h g−1 after 1000 cycles. Even at a higher current density of 1.0 A g−1, it maintained a high reversible capacity of 72.5 mA h g−1 after 3000 cycles. Furthermore, it displayed excellent rate capability, with an average reversible capacity of 98.0 mA h g−1 at a high rate of 5.0 A g−1, showing a potential application capability for potassium ion batteries. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 11440546
- Volume :
- 48
- Issue :
- 33
- Database :
- Academic Search Index
- Journal :
- New Journal of Chemistry
- Publication Type :
- Academic Journal
- Accession number :
- 179084398
- Full Text :
- https://doi.org/10.1039/d4nj01993h